What are some alternatives?
When comparing Ranktab and MindMeister, you can also consider the following products
IdeaScale - IdeaScale is the leading innovation management software platform for the enterprise, government, and education.
XMind - XMind is a brainstorming and mind mapping application.
Viima - Viima's mission is to allow companies to build what their customer wants, or in turn to fail faster with minimal wasted effort
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Crowdicity - Idea management software for smart organizations.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.